84284316 ÷ 646 
We want to figure out the number of times 84284316 can be divided by 646.

On to step 1:
646 can be fit into 8 0 times, resulting in a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Grab the next digit (4) from the dividend, add it to 8, then carry on: 84 / 646

On to step 2:
When dividing 84 by 646, we get 0 with a remainder of 84.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 84 and we're left with 84.
Bring next digit (2) of the dividend behind the 84 and repeat the process: 842 / 646

Moving on to step 3:
When dividing 842 by 646, we get 1 with a remainder of 196.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 196 after subtracting 646 from 842.
Grab the next digit (8) from the dividend, add it to 196, then carry on: 1968 / 646

Step 4:
646 goes into 1968 3 times with a remainder of 30.
Use 3 as the next digit of our solution. 
Result so far: 13.0
Deduct 1938 from 1968 and we're left with 30.
Grab the next digit (4) from the dividend, add it to 30, then carry on: 304 / 646

Going ahead to step 5:
The number 646 fits into 304 0 times, leaving a remainder of 304.
Record the quotient 0 as the next digit in the result. 
Result so far: 130.0
The remainder is 304 after subtracting 0 from 304.
Bring next digit (3) of the dividend behind the 304 and repeat the process: 3043 / 646

Going ahead to step 6:
646 can be fit into 3043 4 times, resulting in a remainder of 459.
Record the quotient 4 as the next digit in the result. 
Result so far: 1304.0
If we take 2584 away from 3043, we end up with 459.
Take the next digit (1) from the dividend and append it to 459, then repeat: 4591 / 646

Let's proceed to step 7:
646 goes into 4591 7 times with a remainder of 69.
Write down 7 as next digit of the result. 
Result so far: 13047.0
Subtracting 4522 from 4591 leaves us with 69.
Include the next digit (6) from the dividend after 69, then repeat: 696 / 646

On to step 8:
696 divided by 646 is 1 with a remainder of 50.
Use 1 as the next digit of our solution. 
Result so far: 130471.0
Subtract 646 from 696 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Let's proceed to step 9:
If we divide 500 by 646, we get 0 and a remainder of 500.
Write down 0 as next digit of the result. 
Result so far: 130471.0
Subtract 0 from 500 to get 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

Step 10:
646 goes into 5000 7 times with a remainder of 478.
Write down 7 as next digit of the result. 
Result so far: 130471.07
If we subtract 4522 from 5000, we get 478.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4780, and continue the process.

Advancing to step 11:
The number 646 fits into 4780 7 times, leaving a remainder of 258.
Write down 7 as next digit of the result. 
Result so far: 130471.077
Subtract 4522 from 4780 to get 258.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2580, and continue the process.

The final result is 130471.077 with a remainder of 0.0258.